SERS studies on the structure of thioglycolic acid monolayers on silver and gold

被引：137

作者：

Królikowska, A ^{[1
]}

Kudelski, A ^{[1
]}

Michota, A ^{[1
]}

Bukowska, J ^{[1
]}

机构：

[1] Warsaw Univ, Dept Chem, PL-02093 Warsaw, Poland

来源：

SURFACE SCIENCE | 2003年 / 532卷

关键词：

Raman scattering spectroscopy; self-assembly; silver; gold; carboxylic acid;

D O I：

10.1016/S0039-6028(03)00094-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Chemisorption of thioglycolic acid (TGA) on silver and gold has been studied using surface-enhanced Raman scattering. We found that the strength of TGA strongly decreased after adsorption. Significantly more decreased strength was observed for TGA adsorbed on Au. The average conformation of adsorbed TGA molecules depends on the kind of the substrate and on degree of dissociation of TGA. The higher portion of TGA molecules adopts trans conformation when layers are formed on the Ag substrate and when more carboxylic acid groups are deprotonated. The ratio of gauche to trans conformers of TGA molecules significantly changed during the incubation on silver. In the first stage of incubation the relative amount of a gauche conformer increases, but after about 1 h the gauche conformer starts to disappear. The average conformation of TGA adsorbed on the gold substrate did not change during the incubation. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：227 / 232

页数：6

共 13 条

[1] SURFACE RAMAN-SCATTERING OF SELF-ASSEMBLED MONOLAYERS FORMED FROM 1-ALKANETHIOLS - BEHAVIOR OF FILMS AT AU AND COMPARISON TO FILMS AT AG [J].